* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ul, ol {
    list-style: none;
}
img, input {
    vertical-align: middle;
}
a {
    text-decoration: none;
}
input, textarea {
    outline: none;
}
textarea {
    resize: none;
}

html {
    height: 100%;
}
body {
    height: 100%;
}
#app {
    height: 100%;
}